sort-command

The sort command is useful for sorting lines.

file1.txt
dog
cow
cat
elephant
bird

$ sort file1.txt
bird
cat
cow
dog
elephant

You can also do a reverse sort:

$ sort -r file1.txt
elephant
dog
cow
cat
bird

And also sort via numerical value:

$ sort -n file1.txt
bird
cat
cow
elephant
dog

The real power of sort comes with its ability to be combined with other commands, try the following command and see what happens?

$ ls /etc | sort -rn

What flag do you use to do a reverse sort?

-r